PartsTable
Technical Data Sheet
PartsTable / MRO / 21399
21399 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The THERMOSTAT,BATTERY ASSEMBLY is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include end_item_identification: 4930-01-549-7112; LUBRICATING UNIT,POWER OPERATED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5110-00-083-0042, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MRO→ MRO_GENERAL→ 21399
NSN: 5110-00-083-0042
FSC: 5110
CAGE: 78525 — STANLEY TOOLS DIV OF STANLEY WORKS (USA)
SPECIFICATIONS
end_item_identification4930-01-549-7112; LUBRICATING UNIT,POWER OPERATED
NSN5110-00-083-0042
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available THERMOSTAT,BATTERY ASSEMBLY TITLE COMPONENT PN 21399 MFR THERMOSTAT,BATTERY ASS
KEY FEATURES
•
STYLE DESIGNATOR: FLAT, STANDARD PLANE, DETACHABLE BLADE
•
LARGEST WIDTH: 1.250 INCHES IN
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESREPLACEABLE BLADE (NSN 5110-00-045-6213)
STYLE DESIGNATORFLAT, STANDARD PLANE, DETACHABLE BLADE
OVERALL LENGTH5.500 INCHES NOMINAL IN
LARGEST WIDTH1.250 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
PM21399Interchangeable
interchangeable cross-reference
interchangeable
21399Interchangeable
interchangeable cross-reference
interchangeable
399Interchangeable
interchangeable cross-reference
interchangeable
3759220Interchangeable
interchangeable cross-reference
interchangeable
17690Interchangeable
interchangeable cross-reference
interchangeable
3883005Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21399?
21399 is a THERMOSTAT,BATTERY ASSEMBLY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 21399?
There are 20 known substitutes for 21399: PM21399, 21399, 399 and 17 more. Substitute compatibility should be verified for your specific system.
Is 21399 still available?
21399 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026